Ospreys are fish specialists whose welfare depends entirely on access to productive freshwater fisheries, making water quality and fish population management critical.
Osprey welfare at breeding sites is determined almost entirely by fish availability within reasonable flying distance. Parents raising three chicks face extreme foraging pressure that drives extended foraging bouts and physiological depletion. Poor fishing years due to drought, pollution, or overharvesting of prey fish cause chick starvation. The recovery of UK osprey populations is inextricably linked to the recovery and maintenance of productive freshwater fish populations.